Tungsten(III) iodide

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Tungsten(III) iodide, also called tungsten triiodide, is a chemical with the formula WI3. It can be made by reducing tungsten hexacarbonyl (W(CO)6) with iodine. The compound is a black solid that releases iodine at room temperature and is less stable than molybdenum(III) iodide. It does not dissolve in water but will dissolve in acetone and nitrobenzene, and is only slightly soluble in chloroform. It decomposes to tungsten(II) iodide. Its molar mass is 564.6 g/mol.